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Grand Slam Sports Cards in Nampa, ID
Grand Slam Sports Cards sells trading cards at 2108 Caldwell Blvd Ste 113, Nampa, ID. It has a 4.9-star rating from 313 Google reviews. Customer reviews or the shop's own website show it carries sports cards, Pokémon and Magic: The Gathering.
Games carried
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Sports cards
More sports card shops →“We had such an amazing experience at Grand Slam Sports Cards and just wanted to say how grateful we are.” (Google review)
Mentioned 7 times in reviews · Listed on the shop's website
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Pokémon
More Pokémon shops →“Came in here looking for some MTG stuff but ended up leaving with a handful of Pokemon singles.” (Google review)
Mentioned 5 times in reviews · Listed on the shop's website
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Magic: The Gathering
More Magic shops →Same review as Pokémon, above.
Mentioned once in reviews
What collectors say
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Big singles selection · Sealed product
“The selection is impressive — whether you’re hunting for vintage singles, modern hits, sealed boxes, or supplies to protect your collection.” (Google review)
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Box breaks
Per the shop's website
From Google reviews
We had such an amazing experience at Grand Slam Sports Cards and just wanted to say how grateful we are. The shop is super clean, organized, and welcoming, and you can tell they really care about the atmosphere and the people coming in. Christian was seriously awesome and made the whole experience unforgettable.
Stopped in to check things out the day before their grand re-opening and loved it! Shop is super clean, organized, and easy to navigate. Great selection of cards across all major sports and will definitely be coming back to snag a few I have my eyes on. Owners Chris and Jason are great!
I am glad I came into this business today. Since February 2026 these owners have taken over this business. They are flat amazing!! I went in for my son on pokemon and they were fabulous on the deals. They are great for taking your Pokémon cards in to do a trade or a buyout. They are so personable!!
If you’re a collector in Idaho, Grand Slam Sports Cards is an absolute must-visit. From the moment you walk in, you can tell this shop is built by people who genuinely love the hobby.
Where to find Grand Slam Sports Cards
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